Censorship may also be directed at religious ideas, as in the Saudi Arabian prohibition on preaching Christianity, liberal restrictions on public expressions of religion, or the Roman Catholic Church's now-recinded ''Index Librorum Prohibitorum''. | Censorship may also be directed at religious ideas, as in the Saudi Arabian prohibition on preaching Christianity, liberal restrictions on public expressions of religion, or the Roman Catholic Church's now-recinded ''Index Librorum Prohibitorum''. |